iOS Cocoapods的pod install出现的某个错误 but they required a higher minimum deployment target.

关于cocoapods的安装和使用的基本教程：

http://my.oschina.net/vimfung/blog/182427?fromerr=j7l3DvCG

出现以下错误提示：

Specs satisfying the `IQKeyboardManager (~> 3.3.4)` dependency were found, but they required a higher minimum deployment target.

解决方案：

platform :ios 

pod 'JSONKit', '~> 1.5pre'

需要在:ios后添加代码ios的版本号，如添加：  ,'7.0'

即像这样：

platform :ios , '7.0'

pod 'JSONKit', '~> 1.5pre'